To craft an illusion block, You will need to place Vinteum Dust in all four corners, and put a Niveus Rune (Black) in the top, bottom, left, and right slots of the crafting table, leaving the center empty. The end result will be four Illusion Blocks.

The Illusion Block is used to conceal hidden locations. It is used in many of the structures generated by Ars Magica to hide the Tower Protector Blocks.

Illusion Blocks can take the form of most Solid (Non-Transparent) Blocks.

To place your block, stand one block away from the type of block you wish your Illusion Block to appear as and place the Illusion Block while looking at the target block, if done corectly it will look like a normal block of the targeted block/gold block